Tire valve stem



June 28, 1932. R. E. BUCK TIRE VALVE STEM Filed May 6. 1929 4M 7. sum mm Z 05 MD I 1/ Patented June 28, 1932 UNITED STATES- RUSSELL E. BUCK, OF VICKSBURG, MICHIGAN TIRE VALVE STEM Application filed m a, 1929. Serial m. 860,678.

The main object of this invention is to provide an improved tire valve stem in which:

the airis effectively retained and at the same time may be introduced to the tire or the tire pressure, tested without the necessity of removing caps or closures. I

A further object is to provide a structure having these advantages which is economical to produce and the arts are of substantial 'size and easily assem led.

Objects relating to details and economies of my invention will a pear from the description to follow. T e invention is defined and pointed out in the claims.

A structure which is a preferred embodiment of m invention isillustrated in the accompanying drawing, in which:

Fig. 1 is a fragmentary view mainly in longitudinal section on line 11 of Fig. 2 of,a tire valve stem embodying my invention.

Fig. 2 is a transverse section on line 2-2 of Fig. 1.

Fig. 3 is a detail view mainly, in section on line 3-3 of Fig. 2.

Fig. 4 is a perspective view of the closure valve.

The embodiment of my invention illustrated comprises a stem 1 having an extereo nally threaded nip le portion 2 at its outer "end. The bore 3 oi this stem is unthrea-ded but is formed with an outwardly facing shoulder 4. .This permits very economical production of the stem, it not being necessary to provide more than the one shoulder or to internally thread or tap the same. Also, it will be noted that only the external threads are on the nipple.

I provide a closure member 5 having an opening 6 at its outer end surrounded by an inwardly facing beveled valve seat 7. The closure has an internal shoulder 8 against which the flange 9 of the valve seat member 10 is seated. indentations 11 below the flange retain the valve seat member rotatably; that is, so that itcan swivel within the closure.

The inner end of the valve seat member is externally beveled providing a relatively thin valve seat 12.

A gasket 13 is arranged around the valve seat member and is supported thereby so that it coacts with the end of the stem.2 effectively sealing the joint between the closure and the stem. Owin to the valve seat member being swivelle the gasket, even though made of soft rubber, is not distorted or injured in the eventthe closure be screwed down further than is necessary as the valve seat member will remain stationary 90 while the closure rotates; that is, after sufficient pressure has been placed upon the gasket.

The check valve 14 coacts with the valve seat 12', this valve being of relatively soft 5 rubber and supported in a cup-like holder 15 on the stem-like body member 16. This body member has a spherically curved head 17 at its upper end projecting into the lower end of the'valve seat member and guided thereby. I

The stem is extended through the thrust member 18, which rests upon the shoulder 4.,

a coiled spring-19 being-arranged between the valve holder 15 and this thrust member acting to yieldingly hold the check valve to its seat. The pressure also acts to hold the valve to its seat.

The closure valve comprises a body member 20 having a spherically curved head 21 so projecting through the opening 6 in the 010- sure member and a collar 22 spaced from the head 21 to receive the valve 23 which is in the form of a cylinder or disc of relatively soft rubber having a bore 24 of uniform diameter 5 from end to end.

The portion 25 of the valve member 20 between the headand the collar is upwardlytapered so that when the valve is arranged thereon, it is supported so that it tapers upso wardly.

The closure valve is held yieldingly to its seat by means of the coiled spring 26 arranged between the collar and the flange 9 of the valve seat member.

My improved tire valve stem is very eiiective in retaining air. At the same time air may be introduced or the tire tested without removing any part. When a tire chuck is placed upon the end of the closure member, 104

the. closure valve is depressecl thereby opening the chuck valve. openin takes place before the valve of the air 0 ucl; is openecl so that in the event there is any air in the tire, some air will be permitted to escape thereby blowing lust or lirt from arouncl the opening of the closure so that when the air chuck is fully opened, little" if any (lll'l) is carried into the valve.

The parts of my valve are of considerable size so that they are substantial and easily to assemble. So far as the check valve is concernecl, it is much simpler than check valves now commonly usecl in pneumatic tires. The entire structure with the twovalves is more eonomical than structures now in use in which check valves ami closures and dust caps are employer Having thus described my invention, what 1' claim as new and lesire to secure by Letters Patent, is:

l. In a tire valve, the combination with a valve stem having an inner bore and a shoul-= (ler therein, of a closure unit comprising a cylindrical closure member having means at one extremity for attachment to the exterior of the valve stem ancl having an opening at its opposite extremity, clepressible means mounted within the closure member having a portion protruding through the latter eatremity of the closure member, and an an: nnlar seat member mountetl within the closure member; a removable valve unit mountefi within the stem anal comprising an elongated bociy member, a valve member on one extremity thereof, a thrust member. slidably mounted on the opposite extremity of the boaiy memher and a spring between the valve member an i thrust member, saicl valve unit being loosely mounte f. the bore of the stem with the thrust member engaging the shoulder therein; the seat member of sai l closure unit upon application of the unit to the valve stem engaging said valve mengber in sealing relation therewith and clepressing the same to loacl the spring of the valve unit, said depressible means upon said assembly being elepressible to engage anu unseat said valve.

2. in a tire valve the combination with a valve stem having bore aml a shoulfier therein, of a closure unit comprising a cylinrlrical closure member having means at one extremity for attachment to the exterior of the valve stem having an opening at its opposite extremity, (lepressible means mounted within the closure member and hav- "ing a portion protruding through the latter Gil extremity of the closure member, a cylindrical seat member within the closure member an having an annular seat portion extending to ward the valve stem; a removable valve unit mountecl within the valve stem ant comprising an elongatecl body member having a curved heal at one extremity, a valve memher on one extremity thereoi belovv saizl curved hea, a thrust member momrtecl at ing saiai valve member in sealing relation therewith ancl oepressing the same to load the resilient means oi? the valve unit, saicl clepressible means apon sai i assembly being manually operable to unseat said valve.

3.1%. closure unit .ior a valve stern cor prising a cylincirical closure member open at opposite enels anal ,prcvidled'at one end with means for %curing to a valve stem, a pair of spaced valve seats within the closure men;-

her, a valve on the outermost of the seats,

stern means on the valve having one portion extending through the free end of the closure member and. another portion extending to the remaining valve seat; a valve bo iy on the remaining valve seat, anti a resilient means for each valve for en aging each valve to urge the valves to their respective seats; said stein being depressible to unseat saiil first valve and; being iurther depressible to engage and unseat said last named valve.

in Witness whereof I have hereunto set ray hand.

RUSSELL l3. BUCK.

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